Sure - we went with a pre-made venturi burner rated at 150,000BTU from a great guy out in Washington state. He is a blacksmith and teaches classes as well as makes these for schools around the country. He was very helpful and knowledgeable about the forge build - he was a great help to us and very happy to talk with us on the phone.
U s Made Gas Burner Blacksmith Forge Raku Kiln Propane Foundry 150 000 BTU | eBay
I actually bought the hose and the regulator but it didn't arrive in time for Christmas so I went to my local hardware store and built one. The hose setup came in the day after Christmas so I just put it on the shelf for the next forge.
Adam